How system knows where to credit/Debit

Summary:

How system knows where to credit/Debit

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Experts, I am learning Sub-ledger Accounting and have a very basic question.

I will try to explain my question using an example.

Say, I have done an OSP PO delivery to a Work order.

Normally, the accounting entries will be as below:

Receipt Accounting:

Dr. Cr.

Receiving Inspection 100

Accrual 100

Cost Accounting:

Dr. Cr.

Receiving Inspection 100

WIP Valuation 100

This is the Journal Entry Rule set defined below for Direct Delivery to Work Order (Event class) and Direct Delivery to Manufacturing (Even type)

Here I can see only one Line type that is "Debit" in the Journal entry line rules.